Loading patent…
AssigneeTechni AS
InventorsDavid Christian Petersen, Jan Martin Bendiksen, Petter F. Schmedling, Morten Roll Karlsen, Roland Elsenträger, Audun G. Kolle
Estimating the term…
A system for measuring the position of a rod element as, for example, a hydraulically or pneumatically operated piston rod. Unlike the prior art, the system according to the present invention employs a measuring principle that does not require preparatory treatment of the rod element as is required in the known solutions. The system employs direct time of flight measurements with the aid of acoustic surface waves that are introduced into the rod element. The instrument is retrofittable on existing cylinders without any modification/ reconstruction thereof An EMAT principle is employed to introduce the surface waves into the measurement in a non-contact manner.
-9. (canceled)
A system for a pneumatic or hydraulic cylinder, linear guide, damper, rod element or similar components, adapted to provide position measurement by means of the distance to one and/or both ends of a rod element, wherein an ultrasound-based time of flight measurement is used directly in the translatory and/or rotary element, and that the sound waves for the time of flight measurement are generated by a sensor in the form of an EMAT which generates and detects the sound wave, wherein permanent magnets of the sensor have a corresponding orientation in the radial direction with respect to their individual north and south orientation.
A system for a pneumatic or hydraulic cylinder, linear guide, damper, rod elements, axles or similar components, adapted to provide integrity measurement with the aid of reflections from acoustic impedance changes due to cracks and damage, wherein waves for the integrity monitoring are generated by a sensor in the form of an EMAT which generates and detects the sound wave and is fixedly installed, but where the monitored object is able to rotate and/or translate relative to the sensor, wherein permanent magnets of the sensor have a corresponding orientation in the radial direction with respect to their individual north and south orientation.
Dependencies are inferred from the claim text.